Hello, On Thu, Oct 19, 2006 at 03:22:02AM -0500, Andy Howell wrote: > Hello, > > I'm tying to understand how defines get added to config.h. In my > configure.ac file I have: > > if test "apple" = "orange"; then > AC_DEFINE_UNQUOTED(HAVE_SOMETHING,1,[Define if SOMETHING]) > fi > > My test fails, so I don't expect to get > > /* Define is SOMETHING */ > #define HAVE_SOMETHING 1 > > in config.h > > I did a sh -x on configure, but I never see it do HAVE_SOMETHING. it is OK. The template config.h.in contains `#undef HAVE_SOMETHING'. (It is usually created by autoheader.) Configure collects all AC_DEFINES, the one you quoted above is not executed, of course. At the end, configure creates and calls config.status. config.status makes substitutions for all AC_DEFINES, but HAVE_SOMETHING is not among them, so the `#undef HAVE_SOMETHING' stays there. Then it comments out all #undefs, but that's a general substitution, ie. it does not contain `HAVE_SOMETHING'. Hope this helps, Stepan Kasal _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
